I can tell you that the internals are way different. I put a gaser one in mine and I had eratic readings so I took it apart to be sure it was not varnished. This could have just been another bad unit. Put another diesel one in from my 82 parts car and GTG.

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1974 450SL White/Navy Blue

1983 300SD White/Parchment, VDO Boost Guage, 215/60R15 Bridgestone Potenza RE960AS Pole Positions on 15X7 15 Hole Wheels, Straight Piped, 298K?

2004 Ford Excursion XLT 4X4, 5.4L V8, 285/65R16 BFG AT KO